Is CVE-2019-19331 in the CISA KEV catalog?

No. CVE-2019-19331 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-19331?

CVE-2019-19331 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-19331?

CVE-2019-19331 has an EPSS score of 2.17% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-19331?

Upgrade knot-resolver on debian 11 to 5.0.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2019-19331

HIGHEPSS 80th pctl

7.5

CVSS v3

NVD

Description

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

CWE-407 CWE-404

How to fix

Remediation Available

knot-resolverDebian

Fixed in:5.0.1-1CVE-2019-19331

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.17%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Vendor Advisory1

knot-resolver.cz

Other references1

lists.debian.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.